Electronics
omas
SAT127/SAT127A
Dual, Adjustable, Negative & Positive, Linear Voltage
Regulator
(Preliminary)
FEATURES
Wide Input Voltage Range: +3.5V to +37V, -2.5V to –26V
COTS & MIL Level screening available
Dual Adjustable outputs
Compact Surface Mount Package
1% or 2% Initial output accuracy
DESCRIPTION
The SAT127 is a military qualified, wide-input range linear regulator designed for harsh
environments. Packaged in a hermetic, 8-Pin package, this device is an excellent choice
for applications with limited board space. The SAT127 provides ±1.0A of output current
over the full Mil-Temp range of –55
o
C
to +125
o
C
. The device also features internal
thermal shutdown, output current-limiting circuitry and ±1% output accuracy. The
SAT127 is provided in adjustable and fixed output voltage configurations. The
adjustable only requires 2 external resistors per output to program output voltages. Fixed
versions do not require any additional components saving cost and board space.
ABSOLUTE MAXIMUM RATINGS
(Exceeding maximum ratings may damage the device)
Symbol
Vo
Io
Pd
Rthjc
Tstg
Top
Tj
W
Tsold
Parameter
DC output Voltage
Output Current
Power Dissipation Tcase=25deg.C
Thermal Resistance, Junction to Case
Storage Temperature
Operating Temperature Range
Maximum Junction Temperature
Package weight
Maximum Soldering Temperature, 10sec
Value
+37V, -26V
±1.0
TBD
3.0
-65 to +150
-55 to +125
150
TBD
300
Unit
V
A
W
o
C/W
o
C
o
C
o
C
G
o
C
SatCon Electronics
1
SAT127A Preliminary Web Rev 1
ELECTRICAL CHARACTERISTICS @ Ta=-55deg.C to +125deg.C
(Unless Otherwise Specified)
Symbol
Parameter
Positive Reference
Voltage accuracy
Negative Reference
Voltage accuracy
Input Voltage Range +
Input Voltage Range -
Test Conditions
Min
V
REF
V
REF
V
IN+
V
IN-
V
LINE+
V
LINE-
V
load+
V
load-
I
adj
ΔIadj
Icl+
Icl-
SAT127A
Typ
Max
Min
SAT127
Typ
Max
1.275
-1.200
+40
-30
27
27
15
15
100
5
1.6
TBD
V
V
V
V
mV
mV
mV
mV
μA
μA
A
A
Units
Vdiff = 3.0V, I
L
=10 mA, Ta = 25
o
C
1.238 1.25 1.262 1.225
Vdiff = 40V, I
L
=10 mA,
Ta = 25
o
C
-1.270
-1.225 -1.300
Iout=1.0A
+4.25
-2.25
+40
-30
27
27
15
15
100
5
1.6
TBD
+4.25
-2.25
Iout=1.0A
Vref= Vout – Vadj
Line Regulation (Note 1) I
L
=10 mA
Vref= Vout – Vadj
Line Regulation (Note 1) I
L
=10 mA
Load Regulation (Note 1) Vdiff= 3V, 3mA≤I
L
≤1.0A
Load Regulation (Note 1) Vdiff= 3V, 3mA≤I
L
≤1.0A
Adjust-pin current
Short-circuit Current
Short-circuit Current
Vdiff= 3V, 10mA≤I
L
≤5.5mA
Vdiff=10.V
Vdiff=10.V
Adjust Pin current change
Io=
0.5A,
Notes:
1. Load & Line regulation are measured at constant (Tj) junction temperature using a low duty cycle
pulse. Changes in output voltage due to heating effects must be evaluated separately.
SatCon Electronics
2
SAT127A Preliminary Web Rev 1
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